Product Summary

Circular pipe are used to renew sewer or drain pipelines and culverts of circular cross section. The Interflow range of circular pipe is formed by taking a continuous strip of plastic and spirally winding it inside the deteriorated host pipe, locking or welding the edges of the strip together to form a water-tight pipe within a pipe. The plastic strip or "profile" is smooth on one side and ribbed on the other. This allows it to provide a smooth liner with maximum strength-to-weight ratio. The liners are structural meaning they can be designed to take all loads, typically assuming the deteriorated host pipe has no remaining strength.

A circular pipe capable of being manufactured easily with high degree of accuracy as a pipe is used in the case a pipe roof having the same width as that of an upper floor section of a planned underground construction F is formed by making the force-fit and burying of the pipe formed of a linear flat plate mounted on the upper surface thereof in a detachable manner in a parallel state in the ground. Excavation devices such as a screw auger, etc., are inserted into the circular pipe, and the force-fit and construction of the circular pipe is smoothly made while excavating the overall ground on the opening end side of the circular pipe.